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Descrição
FlashCards por Those Crepes Are Safe Fam ツ, atualizado more than 1 year ago
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Criado por Those Crepes Are Safe Fam ツ
mais de 7 anos atrás
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| Questão | Responda |
| What is a contact force | Force arising when objects are touching e.g. friction |
| What is a non-contact force | Force that arises although objects are not touching, as in magnetism |
| What are balanced forces | Forces on an object that act in opposite directions and are equal in size |
| What does equilibrium mean | A state in which opposing forces are balanced |
| What is a resultant force | A single force which has the same effect on an object as a set of forces it replaces |
| What is a newton | A unit of force (N) |
| What does fluid mean | A substance that will flow e.g. liquids but also gases |
| What is drag | Resistive force of air or water |
| What does streamlined mean | Has a shape that helps an object to move easily through a fluid with very little friction |
| What does friction mean | A force that opposes movement |
| What does energy mean | Something has energy if it has the ability to make something happen when that energy is transferred |
| What is compression | Force squashing or pushing together |
| What is tension | A force applied to a material which tries to stretch it |
| What is deformation | Change of shape |
| What is linear relationship | A relationship between two variables such that changing the independent variable causes the same change in the dependent variable e.g. doubling the first causes the second to double |
| What is pressure | Force on a certain area |
| What is area | Length x width; units are squared |
| What does depth mean | Distance below the surface of a liquid |
| What are molecules | Two to thousands of atoms joined together. Most non metals exist either as small or giant molecules |
| What is atmospheric pressure | The pressure exerted by the weight of air above that point |
| What is height | The vertical distance from the ground to the top of an object (if it is stood on the ground) or to the object (if it is suspended above the ground |
| What are pascals (pa) | Standard unit of pressure |
| What is density | Mass of a material per unit volume |
| What is buoyancy | Upward force on an object in a liquid |
| What is upthrust | Upward force exerted on an object in water |
| What does displaced mean | When an object is put into water it displaces some of the water |
| What is a pole | End of a magnet; may be the north pole or the south pole |
| What does attract mean | Pull towards; a magnet will attract any magnetic material that is close enough |
| What does repel mean | Push away e.g. the north pole of a magnet will repel the north pole of another magnet |
| What does field mean | Area of electrostatic force around an object charged with static electricity |
| What is a compass | e |
| What is a magnetic field | Space in which a magnetic material feels a force |
| What is an electromagnet | Type of temporary magnet that is magnetic only when an electric current passes through it |
| What is a solenoid | A cylindrical coil of wire acting as a magnet when carrying electric current |
| What is a core | Piece of iron inside the coil of an electromagnet which makes the magnetic field stronger |
| What is an armature | Pole in an electromagnet or moving iron part of a solenoid, such as an electric bell |
| What is contact | Point at which a circuit is made, for example a switch |
| What is a circuit breaker | Device that breaks a circuit when too high a current flows |
| What is a variable | Factor whose value may be altered and which may affect the outcome of an experiment |
| What does discrete mean | A variable where only certain values are possible |
| What does continuous mean | A variable for which you can select any value |
| What is a relationship | An identifiable link between two variables, whereby changes in one seem to affect the other. It does not necessarily mean that one is causing the other |
| What is a limit | An extreme value; going beyond the limit may cause a pattern or relationship between factors to break down |
| What is a lever | Simple machine that uses the turning effect of a force about a pivot |
| What is work | Work is done when energy is transferred, such as by a force acting over a distance |
| What is a machine | Apparatus using mechanical power |
| What is force | A push, pull, shear or turning effect; forces can be contact or non contact |
| What is an input force | The amount of effort put in |
| What is an output force | The force an object has as a result of an input force |
| What is temperature | A measure of how hot an object is - e.g. in degrees Celsius |
| What is degrees Celsius | Degrees Celsius is a measure of temperature; pure water freezes at 0 degrees and boils at 100 degrees C |
| What is thermal energy | The energy in an object due to its temperature |
| What is conduction | Transfer of thermal energy in certain solids by the vibration of particles |
| What is convection | The movement caused in a fluid when hotter (less dense) material rises, and colder (denser), material sinks under the influence of gravity, resulting in transfer of thermal energy |
| What is insulation | A substance that will reduce how quickly thermal energy is transferred (thermal insulator) or will resist the flow of current (electrical insulator) |
| What is radiation | Energy being transferred by waves. It can be electromagnetic (such as light or radio) or acoustic (such as sound) |
| What is an insulator | Does not allow a current to pass |
| What are the features of metals | Shiny, good conductor of electricity and heat, malleable and ductile, and usually solid at room temperature |
| What are the features of non-metals | Dull, poor conductor of electricity and heat, brittle and usually solid or gaseous at room temperature |
| What is a thermal conductor | A material that enables energy to pass through it quickly by the collision of particles |
| What is a thermal insulator | A material that does not allow energy to pass through it quickly by the process of thermal conduction |
| What is a conductor | Material that allows thermal energy to be transferred through it easily |
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